Multi-machine Coordinated Control Method for Subsynchronous Oscillation Suppressor in Wind Farm

Abstract

The invention involves a winding field synchronous oscillating inhibitor multi -machine coordinated control method. The system includes: comprehensive monitoring device and sub -synchronous oscillating suppression device distributed in various wind farms in the region.The inhibitors collect voltage, current data of each monitoring point, and through AD data collection and correction links, signal filtering links, and sub -synchronous oscillation frequency identification links to transmit the data and device information of the inhibitors to the comprehensive monitoring device through the wireless network, comprehensive monitoring device, comprehensive monitoring device, comprehensive comprehensive monitoring device, comprehensiveThe monitoring device determines the best sub -synchronous oscillating suppression solution based on the receiving information through the comprehensive data analysis section, and then through the determined second synchronous oscillating frequency and inhibitory scheme to match the proper control parameters through the adaptive control link, and the command command will be controlled through the wireless network.The control parameter signal is sent to each synchronous oscillating suppressor to start the second synchronous oscillating inhibitory mode. Each inhibitor uses its own controller to perform voltage and non -functional power control while achieving sub -synchronous oscillating inhibitory effects.

Description

technical field [0001] The invention relates to a multi-machine coordinated control method for a subsynchronous oscillation suppressor of a wind farm, in particular to the suppression of the subsynchronous oscillation caused by a large-scale wind turbine connected to a grid or multiple wind farms connected to a grid in an area. Background technique [0002] New energy sources such as wind energy and solar energy are renewable and clean energy sources. The widespread use of these energy sources reduces the dependence on traditional thermal power generation, which is of great significance to energy conservation and emission reduction. my country's new energy grid-connected power generation technology has developed rapidly, and the installed capacity has increased year by year. New energy power generation has become an important branch of my country's power generation field. However, new energy power generation projects are highly dependent on environmental factors. For example...

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Problems solved by technology

[0003] The electrical quantities in the power system are highly correlated, and subsynchronous oscillations will spread from the vibration source to adjacent wind farms, thereby affecting the stability of the entire regional wind power generation system, and even causing wind turbines to go off-grid

At present, the oscillation frequency monitored in some regional wind farms is distributed in the range of 2-49Hz, and there is no obvious regularity between the oscillation and the power generation and wind speed of the wind farm

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